Duplicate 'Add All Missing Imports' context menu entry

[chrmarti]

Issue Type: Bug

Testing #54861

In the VS Code repo:

• Open extensionLinter.ts
• Remove the Node as JsonNode import.
• Change the one reference from JsonNode to Node.
• Open context menu on error in Problems view

VS Code version: Code - Insiders 1.26.0-insider (5fae91d, 2018-07-25T01:56:56.548Z)
OS version: Darwin x64 17.7.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Load (avg)	3, 4, 4
Memory (System)	16.00GB (0.20GB free)
Process Argv	/Applications/Visual Studio Code - Insiders.app/Contents/MacOS/Electron
Screen Reader	no
VM	22%

Extensions (21)

Extension	Author (truncated)	Version
regex	chr	0.2.0
ssh	chr	0.0.4
vscode-eslint	dba	1.4.12
Spot	der	0.4.0
ghlink	dt	1.0.2
EditorConfig	Edi	0.12.4
tslint	eg2	1.0.34
rest-client	hum	0.19.0
autofilename	Jer	0.1.3
vscode-azureappservice	ms-	0.9.0
vscode-azurefunctions	ms-	0.10.0
vscode-cosmosdb	ms-	0.8.0
azure-account	ms-	0.4.2
azurecli	ms-	0.4.2
github-issues-prs	ms-	0.9.0
PowerShell	ms-	1.8.1
debugger-for-chrome	msj	4.8.2
vscode-docker	Pet	0.0.27
vscode-versionlens	pfl	0.21.1
vscode-open-in-github	sys	1.7.0
azure-iot-toolkit	vsc	1.1.0

[ghost]

Simplified repro:
a.ts: export const foo = 0;
b.ts: export const foo = 0;
c.ts: foo; foo;
Hover over either foo in c.ts to see too many fixes.

[sandy081]

@chrmarti Do you see the same when you show quick fixes in the editor?

[ghost]

@sandy081 Yes.

[sandy081]

@mjbvz Are you aware of this?